Antifriction bearing



Nov. 20, 1928.

v s. B. HASELTINE- AN'rIFRIcnoN BEARING Filed Feb. 9, 1924 Patented Nov. 20, 1928.

UNITED STATES PATENT OFFICE.

STACY B. HASELTINE, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO W. H. MINER, INC., A CORORATION OF DELAWARE.

ANTIFRICTION BEARING.

Application filed February e, 1924 This invention relates to improvements in anti-friction bearings.

One object of this invention is to provide an anti-friction bearing particularly adapted for use as a side bearing on railway cars and wherein the anti-friction element is automatically vcentered vunder the influence of gravity aft-er each actuation thereof when the pressure is released therefrom.

More specilically, an object of this invention is to provide a side bearing having pendulums or counterweights so arranged that when the anti-friction element is moved to either side of its normal central position, 1.5 the counterweights will be oscillated and thereby moved to a position of unstable equilibrium to automatically insure the return of the anti-friction element when the load is removed.

Other objects and advantages of the invention will more clearly appear from the description and claims hereinafter' followmg.

In the drawing forming a part of this.

specification, Figure 1 is a vertical sectional view taken through the ends of the body and truck holsters of a car, showing my improvements in connection therewith. Figure 2 is a vertical 'sectional view taken substantially on the line 2-2 of Figure 1. And Figure 3 is a vertical sectional view showing a modified form of my device.

In said drawing, 10 denotes the under portion of the body bolster and 11 the ,upper portion of the opposed truck bolster of a railway car. As shown, the improved side bearing is attached to the truck bolster and comprises, broadly, a retaining member or housingA; an anti-friction element- B; and a pair of pendulum or counterweights CMO.

In theferm shown inFigures 1 and 2, the

housing or retainer Aris preferably in the form of a hollow box casting, open at its top and bottom, having end walls 12 an'dpside wallsI 13', the latter extended toward one another at their upper ends to provideftop flanges 14; Lugs 15 are provided adjacent the bottom of the retaining member to receive rivets 16 whereby the housine may be secured to the bolster 11.

A bearing block 17, preferably having a hardened wear plate 18, is secured in the bottom of the housing by peening portions 19 of the lower edges of the end walls 12 over the tapered Ends ofthe bearing block `walls yof the housine serial No. 691,577.

'17 as shown in Figure 1. Openings 20 are provided through the bottom of the side g, whereby dirt, cinders or other foreign matter may be removed from the bearing.

The anti-friction element proper B is shown as comprising a cylindrical roller of slightly less length than the distance between the opposed edges of the Vflanges. 111, said roller being adapted to roll back and forth on the wear plate 18 and project above the hoilsing, said roller also being provided with lugs er trunnions 25 projecting axially therefrom at the ends thereof.

The counterweights or pendulum members O O are arranged, one at each endpof the roller, each of said pendulum 'members comprising a substantially sector-shaped portion having a laterally extending lug or pin 21 integral therewith at the upper end thereof, adapted to be pivotally received within an opening 22 through the side wall 13 of the housing. Each of the pendulum members is further provided with a substantially elliptical or oval recess or opening 23, said opening extending substantially vertically when the pendulums are in normal position, this openingv being extended downwardly to the'lower end of the pendulum member at 24, the. lower part of the same beingonly for the purpose of entering trunnions of thev roller into slotsY n3 `of the counterweights when assembling, and beingvonly of sufficient width fory this purpose. "It will be noted that the pivotal axes of the pendulum members are located above the rotational axis of the anti-y friction roller'and that thel elliptical recesses have their major axes in vertical alineinent with the axes of the pendulum members.

The operation of the device is as follows,

assuming that the anti-friction roller ,is4 actuated toward the left to the dotted line position shown. As soonr as the roller moves towardthe left, the trunnions willv engage with the side walls of the elliptical openings of the pendulum members, 'oscillating said members about their Vpivotal axes, to the dotted line position indicated, and in y which position said pendulum members will be in a state of unstable equilibrium. As soon as the actuating pressure' is released, the pendulum members will pull the roller to its normal osition.

The recesses: 23 conform Substantially closely to the shape generated by lines always normal to horizontal lines through the axes of the trunnions, during the pivotal movement of the pendulum, so that the pendulums exert a substantially horizontal pull upon the trunnions of the roller during the entire returning movement, thus increasing the returning etect of the pendulum `members and their efficiency for the purpose for for which they were intended.

In the form shown in Figure 3, the housing A has end walls 1()2 and side walls 103, the bottom of the housing being open to receive a bearing block 117 having a hardened Wearing plate 118 adapted to coact with the anti-friction element. The anti-friction roller B' is arranged to roll back and forth on the hardened wear plate 118 and is provided With longitudinally extending lugs 125 at the ends thereof.

The pendulum members or counterweights C are arranged between the side Walls of the housing and the ends of the anti-friction roller, each of said pendulumm'embers having an opening 122 adjacent its upper end, so that said members may be pivotally suspended on pins or lugs 121 carried by the housing. Each of the pendulum members is also provided with a substantially elliptical opening 123 adapted to receive the cooperatinglug 125 of the anti-friction element. t

From the fore oing description, it will be seen that all tie parts are held in their assembled relation in the manner hereinbefore described, with but a minimum amount .of lateral and vertical shifting, and that automatic return of the anti-friction element to its normal central position is insured, all without the necessity of using springs -or other delicate means likely to get out of order. y

I have herein shown and described what IV now consider the preferred manner of carrying out my invention, but the same is merely illustrated and I contemplate all changes and modifications that come within the scope of the claims appended hereto.

I claim:

1. In an anti-friction bearing, the combination with a retaining member; of an antifriction roller therein and constantly supported by said retaining member during operation of said bearing; a pendulum member pivoted to the retaining member at the side thereof and adapted to be oscillated by said roller as `the latter moves under load;

leo

and inter-connecting meansV between said roller and pendulum member, said means comprising a pin on one of said parts, the other of said arts provided with a substantially elliptical opening so shaped that the pull on said roller by said pendulum will always be in a substantial horizontal direction.

2. In an anti-friction bearing, the combination with a retainer having side and end walls, and an o en bottom portion, the upper edges of said side Walls being extended inwardly toward each other in overhanging relation; of pendulum members pivotally mounted on said side walls and limited in their pivotal movement by said overhanging portions, said pendulum members being provided with recesses opening toward the free ends thereof; an anti-friction element provided with projections disposed in the recesses of said pendulum members; and a bearing member closing the open bottom of said retainer and providing a bearing sur- `face upon which said element travels.

3. In an anti-friction bearing, the combination with a mounting having a horizontally disposed bearing surface; of a member piv otally connected with said mounting at one of its ends to swing about a fixed axis and normally urged to a vertical position; an anti-friction roller adapted to move to and fro on said bearing surface; and inter-connecting means between said anti-friction roller and said member, said means including contacting surfaces on said member and said roller operating upon movement of said roller to either sideof central position to displace said member from normal vertical position, said surfaces being shaped to eect returning force upon said roller by said member in a direction substantially parallel with the line generated by the center of said roller at all points during the movement of said roller.

4. In an anti-.friction bearing, the combination with a mounting having a rectilineal bearing surface; of a member pivotally supported in said mounting to swing about a fixed axis and normally urged toward central position substantially at right angles with respect to said bearing surface; an antiriction roller arranged to travel on said bearing surface; and-means in the form of` inter-engaging members on said roller and said member for displacing said member from its central position upon movement of said roller to either side of central position on said bearing surface, said inter-engaging members having surfaces so shapedthat the line of contact Vtherebetween throughout` operationof said roller to either side of central position is substantially normal to the line generated by the center of said roller during its movement to either side of central position on said bearingr surface.

5. In an anti-friction bearing, the combination with a retainer having a horizontally disposed bearing surface; of an anti-friction member mounted on said bearing surface and adapted to move to the fro thereon; a centering member swingably connected with said mounting at one end and normally urged to Vertical central position; and inter-connecting means between said members, said means comprising a projection on one of said members, and a vertically disposed substantially elliptical opening in the other of said members, the Walls of said opening co-operating with said projection to urge said anti-friction member to and maintain the same in central position With reference to said retainer.

In Witness that I claim the foregoing I have hereunto subscribed my name this 6th day of February 1924.

STACY B. I-IASELTINE. 

